Driving device for warp machines



July 20, 1954 s. FURST 2,683,917

DRIVING DEVICE FOR WARP MACHINES Filed Nov. 18. 1949 10 1' INVENTOR. TEF'A/V fZYESF BY M to:

ATTOA /VEK Patented July 20, 1954 UNITED STAT 'f.

OFFME Stefan Fiirst, Munich-Gladbach, Germany, assignor to Walter Reiners, Waldniel (Niederrhein Germany Application November 18, 1949, Serial No. 128,127

Claims priority, application Germany. July 16, 1949 4 Claims.

The invention relates to warpers and is particularly directed to a machine of this type in which the warp beam is rotated through frictional contact of the wound-up warp with a pressure drum against which the beam is resting at its circumference.

Hitherto, the pressure drums of such machines have been driven by means of gear-, belt-, chainor friction-drives, which made the construction of the machines complicated and expensive, and which had also the disadvantages of increas ing the width of the machine and making the longitudinal shifting of the pressure roller a difiicult matter.

According to the invention, all these drawbacks are overcome in a surprisingly simple way by having the pressure drum driven by a friction roller directly acting upon the circumference of the pressure drum, the friction roller being driven in any suitable way. In a preferred form of the invention the friction roller is arranged in direct engagement with the driving pulley of a motor. In a construction of this kind the driving pulley may be of the multistep cone type. It is also possible to use a transmission gear shaft instead of the motor pulley for driving the friction roller. According to another feature of the invention the pressure drum is journalled on a stationary shaft preferably so devised that it can be shifted in its longitudinal direction.

The invention will best be understood from the following detailed description in connection with the accompanying drawings, showing by way of example a preferred embodiment of the invention. However, it is to be understood that the invention is not confined to strict conformity with the illustration but may be changed or modifled without material departure from the salient features of the invention as expressed in the appended claims.

In the drawings,

Fig. 1 is a diagrammatic side view of a warper with pertaining drive means; and

Fig. 2 is a top view of the same machine.

The illustrated warper has a machine frame structure I equipped with a channel-shaped supporting member 2. Mounted on the supporting member 2 is an electric motor 3 with a stub-shaft i to which a driving pulley 5 is secured. The direction of rotation of the driving pulley is indicated by an arrow B. A displaceable friction roller '1 is pulled by a spring 8 against the driving pulley 5 and against a pressure drum 9. The pressure drum 9 rotates about a stationary shaft IO. Shaft In is supported in the machine frame I and has a screw thread if at one shaft end in engagement with the frame so that the shaft can be displaced in its longitudinal direction by turning it with the aid of a hand wheel ll. Against the pressure drum 9 rests a warp beam i I, which is journalled in supporting arms is for rotation about a beam shaft if. The supporting arms i3 are pivotally mounted on the machine frame 8 with the aid of trunnions it. The warp threads F pass over a measuring roller 15 before being wound up on the warp beam H.

The pressure drum 9 is driven from the driving pulley 5, which, while rotating in the direction of the arrow 5 drives thefriction roller 1 through frictional contact with the latter. The friction roller 7, which is also bearing against the pressure drum 5, transmits its rotation to the drum, thus causing the drum 9 to rotate in the same direction as the driving pulley 5. The warp beam l l, which is resting against the circumference of the pressure drum 9, is rotated by the pressure drum likewise through frictional contact, so that the thread F, as long as the conditions remain unchanged, is wound onto the warp beam at a constant speed in spite of the increasing diameter of the warp being Wound onto the beam. The friction pulley 5 is of the stepped or multi-cone type so that the take-up speed of the warp beam can be changed simply by setting the floating friction roller l' to a different diameter of the driving pulley 5. The longitudinal dispacement of the shaft id of the pressure drum in the machine frame I by means of the threaded engagement at It makes it possible to easily correct, if necessary, the lateral position of the pressure drum 9 simply by rotation of the hand wheel ll.

What I claim as new and desire to secure by Letters Patent of the United States is:

1. In a warper having a warp beam and having a pressure drum, said beam, when in operation, being movable against said drum and said drum having a normally stationary axis of revolution and having a peripheral pressure surface engage able by the warp on said beam for frictionally driving said beam, the combination of a drive motor having a stationarily journalled rotor shaft parallel to said axis, a friction pulley mounted on said shaft to be directly driven thereby, and a friction roller peripherally and frictionally engaging said pressure surface and said pulley to impart rotation to said drum.

2. A warper drive, comprising a supporting structure for a Warp beam to be wound, an elongated pressure drum having a stationary geometric axis of rotation when in operation and having a peripheral pressure surface for engagement with the warpsurface on the beam, said beam-supporting structure being movable toward said pressure surface for maintaining said engagement, drive means having a friction pulley of a normally stationary geometric axis parallel to said drum axis, said pulley being radially spaced from said drum, and an intermediate friction roller having a diameter larger than the distance between said drum and said pulley and being displaceable transverse to said distance, and a spring connected with said roller and adapted to force said roller into peripheral and frictional contact with said pressure surface and said pulley to transmit rotary motion of said pulley to said drum.

3. A warp-beam drive, comprising an elongated pressure drum having a stationary geometric axis of rotation and having a cylindrical pressure surface for engagement with the warp surface on the beam to be driven, drive means having a pulley of a stationary geometric axis of revolution parallel to said drum axis, said pulley having steps of different respective diameters radially spaced from said pressure surface, and a friction roller having a diameter larger than the largest distance of said pulley from said drum and being displaceable and springbiased into frictional engagement with said pres sure surface and with said pulley, and said roller being displaceable parallel to said drum axis for engagement with a selected one of said pulley steps.

4. A warper drive, comprising a normally stationary shaft displaceable in its axial direction, an elongated pressure drum revolvably mounted on said shaft so as to have a fixed geometric axis of revolution, a revolvable warp beam extending parallel to said drum, said beam being movable and biased toward said drum, said drum having a peripheral pressure surface frictionally engageable with the warp surface on said beam for driving said beam, drive means having a pulley of a fixed geometric axis of revolution parallel to said drum axis, said pulley being radially spaced from said pressure surface, and a springbiased friction roller in frictional engagement with said pulley for driving said drum.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,741,757 Colman Dec. 31, 1929 1,911,944 Easton May 30, 1933 

